Combine several PDFs into one, entirely in your browser

Merging is the most common thing anyone does to a PDF, and it's also where free tools most often hide a wall — a size cap, a daily task limit, or a watermark you only discover at the download step. There's no reason for any of that when the work happens on your own machine.

Drop in as many files as you like, drag them into the order you want, and download the combined document. Because nothing is uploaded, a 300 MB stack of scans costs exactly as much to merge as a two-page memo: nothing, and no waiting on an upload bar.

You can reorder pages within the merged result before downloading, so a set of scans that came out of the feeder in the wrong sequence doesn't need a second pass through another tool. And because the merged document stays in memory, you can go straight on to compressing or signing it without re-uploading anything — which is the part that's genuinely awkward when the work happens on someone else's server.

What this does — and what it doesn't

  • Merging rebuilds the document, which means interactive form fields are not carried over. If any input file has fillable fields, you'll be told before you download rather than discovering it afterwards.
  • Bookmarks and internal links inside each source file may not survive a merge. We show you exactly what was preserved.

Next steps

Split PDF

Break a document into separate files by pages, bookmarks, size or interval.

Organize PDF

Drag pages into a new order, rotate or drop the ones you don't need.

Compress PDF

Shrink a PDF with a side-by-side quality preview and a size target.

Sign PDF

Draw, type, or upload a signature and place it on any page.

Merge PDF — frequently asked questions

How many files can I merge at once?
As many as your device can hold in memory. There's no artificial cap — no '3 tasks per hour', no 50 MB limit, no single-file-per-task restriction.
Can I change the order of the files?
Yes — drag the files into the order you want before merging, and you can reorder individual pages afterwards in the editor.
Will form fields survive the merge?
No, and this is the honest answer most tools don't give you: merging rebuilds the document structure, and interactive form fields don't come along. We detect when an input file has fields and warn you before you commit, so you can fill and flatten first.
Is my PDF uploaded anywhere?
No. Every operation runs in your browser using JavaScript and WebAssembly — the file never leaves your device. You can verify it: load the page, disconnect from the internet, and the tool still works. There is no upload endpoint to send it to.
Is there a file size or page limit?
There's no artificial limit — we don't pay per file, so we have no reason to cap you. The real limit is your device's memory, since the whole document is held in RAM. Large files above roughly 100 MB will show an advisory, and phones have less headroom than laptops, but nothing is blocked.

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